The eight guys in “future roots” band John Brown’s Body claim dual citizenship — Ithaca and Boston. The band brings hot stuff from its latest album, “Amplify,” which debuted in September at No. 1 on the iTunes’ reggae chart. John Brown’s Body plays at 8 p.m. Friday at The Westcott Theater, 524 Westcott St., Syracuse. House on a Spring and Root Shock open. Tickets are $15 in advance, $18 at the door.